Which of the following best describes how an electromagnetic wave travels?

A. Oscillating magnetic fields are parallel to oscillating electric fields, which are perpendicular to the direction of wave motion.

B. Oscillating magnetic fields are perpendicular to oscillating electric fields, which are also perpendicular to the direction of wave motion.

C. Oscillating magnetic fields are parallel to oscillating electric fields, which are also parallel to the direction of wave motion.

D. Oscillating magnetic fields are perpendicular to oscillating electric fields, which are parallel to the direction of wave motion.